RDL HD-MA35U Four-Input Mixer Amplifier

The RDL HD-MA35U is a four-input mixer amplifier for installations that need more source flexibility than the three-input HD-MA35. Inputs 1 and 2 accept balanced microphone or line sources with switchable 24 Vdc phantom power, while inputs 3 and 4 take unbalanced mono or stereo line sources. Each input has its own front-panel volume control plus shared bass and treble tone shaping, and a high-efficiency Class D stage drives 35 watts into a 4 or 8 ohm loudspeaker with a separate 4 watt Zone 2 output for a local monitor or paging feed.

Manual or automatic (VOX) priority ducking lets an announcement override the music program, and the master level is VCA controlled for remote wall adjustment. An automatic sleep mode drops standby draw below 1 watt to meet the strictest energy standards, then wakes the moment audio returns. The amplifier ships with its 100 to 240 VAC power supply, with balanced connections on detachable terminal blocks and unbalanced connections on RCA jacks.